Power drop-hammer



' w`. H. wELcH.

IIJWEII DROP HAMMER.

APPLICATION FILED I JEC. 26. 19H.

Patentedv May 20, 1919.

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w. H. WELCH. POWER DROP HAMMER.

APPLICATION FILED DEC.2E, 191?.

Patentd May-20, 1919.

I SHEETS-SHEET 2.

7272/2122 az' Uff/W AAM/.Lf

W. H'. WELCH.'

POWER DROP HAMMER.

APPLlcAmn man Dec. 2s. 19u.

1,304,426. .Patented m2o, 1919.

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W. H. WELCH. Powie naoP HAMMER.

APPLICATION FILED DEC'LZHS. ISH. 1,304,426. Patented May 20, 1919.

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F'JE

PATENT OFFICE.

WILLIAM H. WELCH, 0F SALEM, OHIO.

POWER DROP-HAMMER.

Specification of Letters Patent.

' Patented May 2o, 1919.

Application led December 26, 1917. Serial No. 208,725.

T 0 all whom t may concern:

. Be it known that I, vIVILUAM H. WELCH, a citizen of the United States,residing at Salem, in the county of vColumbiana and State of Ohio, haveinvented certain new Aand useful Improvements in Power Drop- Hammers, ofwhich the following is a specication.

My invention relates to improvements in power hammers, and moreparticularly to that class or type of power actuated hammers known asdrop hammers.

The primary object of the invention is to provide a generally improvedpower driven hammer of this class which will be exceedingly simple inconstruction, cheap of manufacture, andV efficient in use.

A further object is the provision o'f improved hammer actuating andcontrolling mechanism for a power hammer of this class, of simple andeliicient construction, particularly adapted to meet the varying demandsof actual service, and which will be under full and .complete control ofthe operator at all times during the operation of the hammer.

A still further object is the provision of an improved powerhead,together withvimproved clutch and clutch actuating and controllingmechanism, whereby in connection with suitable foot or treadle operatedmechanism suitably connected therewith, the operator may readily impartany desired stroke or fall to the hammer' head from the minimum to themaximum. v

In carrying out the invention the power driven shaft is provided with asuitable clutch, together with al suitable hammer actuating winding drumand suitable foot' controlled clutch engaging and lreleasing mechanism,whereby the hammer actuating drum may be intermittently movedy in onedirection for elevating the hammer and released and allowed to travel inan opposite direction for dropping the hammer, means being also providedwhereby such clutch engaging and disengaging members may be brought intoaction at variable points in the revolution of the hammer actuating drumthereby enabling the operator to impart a. variable stroke to the hammerhead, and as contradistiuguished from the ordinary power driven drophammers where it lis necessary to predetermine the length of drop orstrokedesired'for the work in hand and thereafter adjusting the hammeractuating and controlling mechanism accordingly. V

With the above mentioned and other ends in view, the invention consistsin the novel construction, arrangement, and combination of parts,hereinafter described, illustrated in one of its embodiments in theaccompanyin drawings, and particularly pointed out in t e appendedclaims.

Referring to the drawings, forming a part of this specification, Figurel, is a front view of a power hammer constructed in `accordance with myinvention, the parts being in their hammer releasing position, and thehammer head being in its lowermost or released position. v l

Fig. 2, a side elevation of the same.

Fig. 3, an enlarged vertical central vsectional view of thepower headand clutch and clutch actuating and controlling mechanism.

Fig. 4c, a cross sectional view taken on line 1*4, of Fig. 3.

Fig. 5, a cross sectional view taken on line 5 5 of Fig. a.

Fig. 6, a cross sectional view taken on line 6-6, of Fig. 3. Y

Fig. 7 an enlarged end elevation of the power' head, certain parts beingbroken away for the purpose of clearer illustration of theclutchdisengaging slide and slide actuating-mechanis Y Fig. 8, an' endelevation of the clutch disengaging slide removed, illustrating Vinparticular the clutch disengaging stepped head.

Fig. 9, a side elevation of the clutch disengaging slide and slideactuating mechanism, certain `parts being broken away for the purpose ofclearer illustration of fthe parts.

Fig. 10, an enlarged vertical sectional view of the power head and4clutch and clutch actuatingv mechanism taken on line 10-10, of Fig. 1,the clutch disengaging head and slide being removed for the purpose ofillustration.

Fig. l1, an enlarged rear elevation of the same and of the clutchdisengaging slide and slide head, certain parts .of the latter beingbroken away for the purpose of illus-- tration.

Fig. 12, an enlarged horizontal sectional view taken on line 12*12, ofFig. 1, and illustrating in particular the foot or treadle controlmechanism for cooperating with the clutch actuating and controllingmecha-v nism.

Fig. 13, a fragmentary perspective' view of one of-thepivoted portionsof the foot or treadle control mechanism.

Similar numerals of reference designate like parts -throughout `all thefigures of the drawings.

The improved drop hammer comprises a suitable frame consisting, in 4thepresent instance, of a base 1, adapted to support a suitable anvil`block 2. The frame further includes Va pair of suitable vertical guidemembers 3.

The power head, in the present instance, comprises a suitable frameconsisting of a cross or base member et, mounted upon and supported bythe vertical guide members 3, and provided with bearing members orpedestals 4a, lprovided with suitable bearing blocks 4b, for carryingthe driving shaft 5. The shaft 5, is adapted to be driven by means of a.driving pulley 5a, and is further provided with a fixed clutch 6, thelatter being secured to the shaft 5, by means of a key member 6, asshown in Fig. 3, of the drawings. The movable clutch member andactuating mechanism and the hammer actuating mechanism may be of anysuitable and convenient form, and in the present instance, comprises amovable clutch member 7, arranged within andin coperative relation tothe fixed clutch member 6, and provided with a hammer actuating member8, in the present instance, in the specific form of a Winding Adrumadapted to carry and operate the hammer strap 9a, connected to a hammerhead 9, the latter operating between the guide members 3, in the usualmanner. The hammer actuating or drum member 8, terminates at one side ina brake hea-d 0r drum 10, said head or drum 10, being adapted to becontrolled in the usual manner yby means of a brake strap 10a, securedat one end by means of a bracket and cross pin 10b, secured to the basevmember 4, of the frame,"and the free end `being connected to aconnecting link or rod 11, extending downwardly and being connected atits lower end to a cross member 12, of an oscillatory foot treadleconsisting of side members 12, pivotally mounted on trunnion members 1a,of the base 1, said foot controlled or treadle mechanism being`constructed and operated as hereinafter described.

As a means of bringing the movable clutch member 7, and its connectedmembers 8 and 10, into and out of engagement with the fixed member 6,during the rotation of the shaft 5, the movable or rotatably mountedclutch member 7, is provided with the split ring members 13, normallydrawn toward their retracted or disengaging positions by means ofconnecting springs 14, (see Fig. a) connected to the brackets 13a, saidring members 13, being adapted to be adjusted to compensate for wear, orthe like, by means of a wedge member 15, linterposed between adjacentends of the split ring members and adapted to be adjusted, in thepresent instance, by vmeans of an adjusting .bolt 16, and as a means ofsimultaneously moving the ring members 13, into and out of clutchedrelation with the adjacent surrounding fixed clutch 6, a rock vshaft 17,is provided, said shaft being connected to the adjacent split ends ofthering members by means of suitable links 17a, and being Aprovided at itsopposite end with a trip arm 17h, Vthe latter being-arranged Vat theface side of the ybrake drum portion of the movable clutch andconsisting in the present instance, of the dual heads or arms 17, and17d, adapt-ed to alternately engage withvthe movable clutch engaging andreleasing trip members or projections hereinafter referred to.

As a means of automatically causing the fixed clutch member 6, vtoengage with the movable clutch 7, at or near the bottom 0f the workingstroke of the hammer as Vthe latter descends by the release of the:movable clutch member 7, and also'to varysuch point of the clutchrengagement to Acompensate for different thicknesses of dies or workbeing operated upon, a variable trip member 18, is provided, said `trip-member 18, in the present instance, being circumferentially movable onthe driving shaft 5, and being provided with a trip projection 18a,against which the Varm .or head '17", of the rock shaft 17, is adaptedto contact thereby rocking the latter to expand the ring members 13,into contact withthe iiXed clutch 6, whereby the latter with therotation of the driving shaft 5, will elevate the hammer head 9, foranother working stroke, and as a means of adjustingthe trip mem- -ber18, to compensate for the variable conditions above referred to, andparticularly of catching the hammer `head 9, on its rebound during itsworking stroke, thefarm of the trip member 18, is connectedgto a'rod orlink 19, the latter, in the present instance, being connected to facrank 20,'ona shaft 21, the shaft 21, being'mounted in a bracket 22, atthe rear of one of the guide members 3, and the shaft 21, being :pro-

vided with a second crank `23,*communicating with a Vsecond link 24,operated "by means of a lever 25, on the front of the machine framewithin ready reach of the plurality of graduated trip projections 27",

arranged in stepped relation to each other and adapted to be moved intothe plane of movement of the arm 17 d, of the trip member 17", of therock shaft 17, 'as the latter is being carried upwardly and about by therotation of the clutched member7, and the hammer actuating drum 8, andrelease the Y,

latter in any desired elevation or length of stroke predetermined uponby the operator through the foot controlled actuating mechanismhereinafter described.

As a convenient means of supporting and moving the head 27, and itsprojections 27h, toward and from the plane of rotation of the trip armportion 17, of the trip arm 17 d,

, the head 27, is mounted on a longitudinally movable slide 28, adapted,in the present Vinstance, to operate in guide ways 4, of one oli thebearing blocks, said slide being provided with racks 28a, meshing withgeared seg-A ments 29, (see Figs. 7 and 9) carried on a rock shaft 30,the latter being provided with a crank arm 31, connected to a connectingrod or link 32, leading downwardly and being connected to a crank V33,'ot' a bell crank member 34, mounted on one of the trunnions la, thesecond arm of the crank member 34, being connected to a horizon-- tallyextending link 35, said Vlink 35be ing connected at its front end to aVcrank 36, carried on a rock shaft 36, the latter being operated by meansof foot treadle 37. The foot treadle 37, is keyed or otherwise securedto the rock shaft 36, so as to enable the latter to be rocked oroscillated by the corresponding movement given to the foot treadle 37,and entirely7 independent of the side members 12, of the foot treadle,such arrangement permitting the trip head 27, to be operated eitherindependently oi or in conjunction with the oscillation of the sidemembers 12, of the foot treadle for loosening or tightening the brakedrum 10, and clutch and hammer member'7 and 8, connected thereto, andoperated as the operator may elect.

As a means of normally holding the en- -tire foot treadle mechanism inan elevated position and thereby holding the brake strap 10a, in lockedengagement with the brake drum 10, one of the side members 12, isprovided with a spiral. spring 38, connected to a bracket 1b, on amachine base, and as a means of limiting the movement imparted to theslide 28, through the rocking foot treadle 37, as hereinbeforedescribed, and thereby causing the clutch to be released at apredetermined point in the elevation of the hammer head, the bell crankmember 34, may be provn vided with an outwardly extending segment 34a,provided with adjustable sto-p pins 34h, adapted to have limitedmovements with respect ltothe adjacent side member 12, of the foottreadle mechanism.

From the foregoing description, taken in connection with theaccompanying drawings, the operation and advantages of myinventionwillbe readily understood.

Having thus described one of the embodiments of my invention, what Iclaim and desire to secure lby Letters Patent, is,-

, 1. In a drop hammer, a hammer, a'shaft, a drum loose on said shaftland connected with said hammer, a brake for said drum, a clutch forconnecting said drum with said shaft, and means to variably act-nate orre- -lease said clutch andto simultaneouslyl release orl actuate. saidbrake whereby the ried.

2. In a drop hammer, a hammer, a shaft, a clutch, hammer actuatingmechanism rotatably mounted on said shaft. and adapted to be engaged bysaid clutch, a clutch releasing member carried by said mechanism, and afoot controlled ,tripA headv adaptedy to be moved toward and to variableengage said clutch releasing member and disengage said clutch wherebythe length of the up-stroke of saidhammer may be varied.v V j 3. In adrop hammer, a hammer, a shaft, a clutch, hammer actuating mechanismrotatably mounted on said shaft and adapted to be engaged by saidclutch, clutch operating member, .eans for variably operating saidmember and releasing said hammer actuating mechanism' for regulating thel.

length of the `down-stroke offrsaid hammer, and. a foot controlledstepped, tri phead movable toward and variably engaging said clutchoperating member Vand' disengaging said clutch whereby the length of theupstroke of the hammer may be varied.

fl; In a drop hammer, a hammer, a shaft, hammer actuating mechanismrotatable thereon, aV clutch for' operatively connecting said mechanismto said shaua clutch operating member carried by saidfmechaism, andtripmechanism for variably engaging said clutch'operating member to engageand disengage said V`clutchwherebv theV length of theV down andup-strokesof said hammer may be varied.

5. In a drop hammer, a-hammer, a hammer actuating mechanism thereon, abrake, a clutch for operatively connecting said mechanism to said shaft,a

shaft,

rotatable f iso clutch releasingmember carried by said mechanism, andfoo-t controlled brake and stepped trip mechanism for controlling saidclutch mechanism and variably engaging said brake and clutch releasingmember to disengage said clutch whereby the length of the tip-stroke ofthe hammer may be varied.

6. In a drop hammer, a hammer, a shaft, hammer actuating mechanismrotatably mounted thereon, a clutch for yoperatively connecting saidmechanism witlirsaid shaft, a clutch operating member carried by saidmechanism, a variable trip member on said shaft for engaging said clutchoperating member and throwing said clutch into engagement with saidhammer actuating mechanism in variable positions whereby the length ofthe dowirstroke of the hammer may be varied, and =a foot controlled triphead adapted to engage said clutch operating member in variablepositions-and disengage said clutch whereby the length of the rip-strokeof said hammer may be varied.

7 In a drop hammer, a hammer, a shaft, a hammer actuating mechanismloose on said shaft, a clutch for operatively connecting` said mechanism4with the shaft, a Aclutch fre leasing member carried by said mechanism,and a foot contro-lled trip head adjustable longitudinally of saidshaft, said -head having a series of steps wherebv by adjustment of saidhead .any one of said steps may be brought into position Vto engagesaidA member to disengage the clutch whereby the length of therip-stroke of the hammer `may be varied.

8. In.a drop hammer, a hammer,a shaft. actuating mechanism loose'on saidshaft and with which the hammer viis connected, a clutch for operativelyengaging said mechanism with the shaft, and foot controlled clutchengaging and releasing mechanism to variably engage and releasey saidclutch whereby the length of the up and down strokes of the hammer maybe varied.

SY). In a drop hammer, a hammer,a driving shaft, provided with rotatablymounted clutch and hammer actuating members, means for throwing thelatter intov and out of engagement with said shaft through said clutchmember, and means for operating and means for ycontrolling said means atvariable relative positions to said shaft during the rotation of thelatter whereby the length of the up and down-strokes of said hammer maybe varied.

10. In a drop hammer, a hammer, 'a driving shaft, providedwith-rotatably mounted clutch and hammer actuating members, variabletrip means for throwing the latter into and out of engagement with saidshaft, and means for operating and controlling said variable trip meansat variable relative positions to said shaftfduringy the rotation of thelatter for changing the terminal points in the working impulses impartedto said hammer actuating` member.

1l. In a drop hammer, a .frame including guide members, a driving shaftprovided with fixed and movable clutch members, a hammer actuatingmechanism connected to said movable clutch member, a hammer carried bythe hammer actuating mechanism between said `guide members, and footcontrolled means for actuatingfand controlling said clutch member atvariable positions relative to and during the rotation `of said drivingshaft whereby the length of .the up and down-strokes of said hammer maybe varied.

12. In a drop hammer, a hammer, a driving shaft provided with rotatablymounted clutch and'hanmier actuating members, variable .means forthrowing the latter into engagement with said shaft clutch and, meansfor throwing `.the same out of engagement with said shaft clutch and,means for Voperating and controlling said last mentioned means atvariable relative positions to said vshaft and hammer actuating memberduring the rotation of the latter whereby the vlength of the up anddown-strokes of said hammer may be varied.

13. Inadrop ha1iimer,a hammer,a frame including guide members, a drivingshaft provided with fixed and movable clutch Aimmbers, a hammeractuating mechanism connected to said movable clutch member and brakedrums, a brake strap on the hammer actuating mechanism, a hammer carriedvby said strap drum between said .gu-ide members, and foot controlledmeans Afor 'simultaneously actuating and controlling said clutch andhammer strap and brake drums at variable positions relative to andduring the rotation of said -driving shaft.

14. In a drop hammer, a hammer, a frame including ,guide members, adriving shaft provided with X-ed and movable clutch members, a hammeractuating mechanism connected to said movable clutch member, a hammercarried by the hammer actuating mechanism betweenv said guide members,brake mechanism for said movable clutch and hammer actuating mechanism,and means for simultaneously actuating and controlling said clutch brakeand hammer actuating mechanism at variable positions "relative to andduring the rotation of said driving shaft for regulating the strokegiven to said hammer.

15. In a drop hammer, a hammer, a shaft, a clutch, hammer actuatingmechanism rotatable on said shaft, a clutch operating member `carried bysaid mechanism, variable means for actuating said clutch actuatingmember to variably engage saidclutch with said hammer actuatingmechanism whereby the length of the down-stroke of the hammer may bevaried, and means for variably engaging said clutch actuating member andvariably dlsengagmg sald clutch and sald hannner actuating mechanismwhereby the length of the 11p-stroke of the hammer may be varied.

16. In a drop hammer, a shaft, hammer actuating mechanism rotatable onsaid shaft, a clutch for connecting and disconnecting said mechanismwith said shaft, a clutch actuating and releasing member carried by saidmechanism, means for variably actuating said clutch actuating andreleasing member and engaging said clutch with said mechanism wherebythe length of the downstroke of said hammer may be varied, and footcontrolled adjustable trip mechanism for engaging said clutch operatingmember whereby to variably disengage said clutch operating member andthereby varying the length of the Lip-stroke of said hammer.

In testimony whereof have atixed my signature in the presence of twoWitnesses.

WILLIAM H. WELCH. Witnesses:

W. C. GRAVES, O. C. BILLMAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patenti, Washington, D. C.

